公开(公告)号：US20240004764A1

公开(公告)日：2024-01-04

申请号：US18188719

申请日：2023-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Daniel Goodman ,  Eddy Duer ,  Igor Shafran ,  Itamar Ofek ,  Michael Hirsch ,  Shaul Tamari

IPC: G06F11/14

CPC classification number: G06F11/1469 ,  G06F2201/84

Abstract: In a method for data recovery in a continuous data protection system, delta values representing an exclusive disjunction between successive values of data block contents of a content fragment of a dataset at a time t(n) and a time t(n−1) for n=1 to i, where i is selected according to a predetermined data protection profile, are generated. The delta values can be used to recover a dataset to a value at the selected point in time in association with a snapshot that is selected as a starting point for recovery based on a cost analysis associated with a volume of disk activity to restore.

公开(公告)号：US20240061622A1

公开(公告)日：2024-02-22

申请号：US18497723

申请日：2023-10-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Michael Hirsch ,  Itamar Ofek ,  Daniel Goodman ,  Igor Shafran ,  Eddy Duer ,  Assaf Natanzon

IPC: G06F3/06

CPC classification number: G06F3/067 ,  G06F3/0604 ,  G06F3/0655

Abstract: A NAS memory controller is provided that is operatively connected to one or more NAS clients for shared memory access, where each NAS client includes a clock and is operatively connected to one another through a low-latency communications network. The NAS memory controller is configured to transmit an indication of a stop time and a restart time to each of the one or more NAS clients, and after the stop time arrives, receive a journal of file operations from each of the one or more NAS clients. The NAS memory controller is further configured to determine a status of each journal, and thus provides a reliable data replication by accurately synchronizing the file operations of the NAS clients using the journal without the need to have a programmatic access to the NAS source, without installation of gateways, and without requirement to reread all data written to the NAS source.